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예제 1

char c = 'A';
int pingPong = 1;

void setup() {
  Serial.begin(9600);
  pinMode(9, OUTPUT);
}

void loop() {
  Serial.print(c);
  c = c + 1;
  if(c>'Z')
    c = 'A';

  if(pingPong == 0)
    digitalWrite(9, LOW);
  else
    digitalWrite(9, HIGH);

  pingPong = 1 - pingPong;
  delay(1000);
}

예제 1

#include <SoftWareSerial.h>

void setup() {
  Serial.begin(9600);
  BT_Serial.begin(9600); // 블루투스 연결
}

void loop() {
  if(BT_Serial.available()) {
    Serial.write(BT_Serial.read()); // 블루투스 읽기
  }

  if(Serial.available()) {
    BT_Serial.write(Serial.read()); // 블루투스 쓰기
  }
}

예제 1

#include <SimpleTimer.h>
#define BUTTON 2
#define ALARM 8
#define LED 13

SimpleTimer timer;
int pState = LOW;
boolean booked = false;

void setup() {
  pinMode(BUTTON, INPUT);
  pinMode(LED, OUTPUT);
}

void loop() {
  int state = digitalRead(BUTTON);

  if(pState == LOW && state == HIGH) {
    if(booked == false) {
      booked = true;
      digitalWrite(LED, HIGH);
      timer.setTimeout(5000, beep); // 5초 뒤에 beep 함수 호출
    }
  }

  pState = state;
  timer.run();
}

void beep() {
  booked = false;
  digitalWrite(LED, LOW);
  tone(8, 1000, 20);
  delay(100);
  tone(8, 1000, 20);
  delay(100);
  tone(8, 1000, 20);
}

예제 2

#include <SimpleTimer.h>
#define LED 13

SimpleTimer timer;
boolean ledOn = false;

void setup() {
  pinMode(LED, OUTPUT);
  Serial.begin(9600);
  timer.setInterval(1000, toggle); // 1초에 한번씩 toggle 함수 호출
  timer.setInterval(5000, notify); // 5초에 한번씩 notify 함수 호출
}

void loop() {
  timer.run();
}

void toggle() {
  if(ledOn == true) {
    digitalWrite(LED, LOW);
  } else {
    digitalWrite(LED, HIGH);
  }
  ledOn = !ledOn;
}

void notify() {
  Serial.print("Brightenss : ");
  Serial.println(analogRead(A0));
}